Connection; Inverter Powered Electric Motor; Rotation Direction - FPZ SCL TS Series Instructions Manual

Close the terminal box with the lid and seal the openings of the cable glands to prevent dust, water and moisture from entering.
Check the seals regularly.
•
If a faulty unit is touched there is risk of electric shock!
Install the motor circuit breaker.
Have an electrician regularly check the electrical equipment.
In case of various motor starts in the space of an hour, there are limitations which can seriously damage the
ATTENTION!
unit if ignored. A maximum of n° 6 evenly distributed starts per hour, is allowed.
5.5.1

CONNECTION

Incorrect connection of the motor can seriously damage the unit.
ATTENTION!
The power supply of the motor and any auxiliary equipment must use wires of suitable thickness in order to
avoid abnormal overheating and high voltage drops.
•
Make sure the supply voltage and frequency match the rating data.
•
Connect the earth wire of the motor to the terminal marked with the following
symbol always before connecting to the mains and check the leakage capacity. The
earth wire is identified by its colour (yellow/green).
•
Connect to the mains by referring to the diagram in the terminal box.
•
Use the openings in the cable glands to run the power cables inside the terminal box.
•
Once the terminal board connections are done, tighten the cable gland to secure the
cables.
•
The electrical connection terminals must be tightened to prevent high contact resistances
and consequent overheating.
•
Ensure the insulation gaps and distances between the different wires as required by the standards.
•
All screws used for closing the terminal board must be tightened down. Damaged screws must be immediately replaced with
screws of equivalent or better quality.
The connection must ensure:
•
lasting safety over time.
•
The ends of the wires must not protrude.
•
The fuses only protect against short circuits and not the motor.
•
Fuse ratings must take account of peak currents, especially in case of direct starting.
•
The protection with motor circuit breaker (thermal or amperometric) is essential against the risks of overload, in the absence of a
mains phase, excessive voltage fluctuation or stuck rotor.
•
Adjust the motor circuit breaker to the rated current as the maximum value.
5.5.2

INVERTER POWERED ELECTRIC MOTOR

ATTENTION!
When powered by an inverter, the unit's nominal pressure or vacuum characteristics cannot be maintained.
For the performance of an inverter powered unit, contact the FPZ after-sales service.
The power supply via inverter is always the responsibility of the installer, who must ensure compliance with the standards and:
•
checking and any measures necessary to comply with the limits of immunity and emission laid down by the standards;
•
checking the suitability of the system and the inverter for operation with standard motors, i.e. class F, or the need for specific
motors for these types of operation.
5.5.3

ROTATION DIRECTION

SCL K blowers - exhausters must be used with the rotation direction indicated
by the arrow on the electric motor fan cover.
•
To check the rotation direction, switch the motor on briefly and observe the
fan.
•
To change the rotation direction, invert the power cable connections,
leaving the earth connection unchanged.
(Refer to the connection diagram located in the terminal box)
The position of the motor does not always allow the rotation direction to be checked, therefore it is advisable to
ATTENTION!
do this check before installation of the system.
FPZ-MI-K TS-MOR-USA-15-R03 21 / 79